University of Oulu

Abdulbari, AA, Abdul Rahim, SK, Soh, PJ, Dahri, MH, Eteng, AA, Zeain, MY. A review of hybrid couplers: State-of-the-art, applications, design issues and challenges. Int J Numer Model. 2021; 34:e2919. https://doi.org/10.1002/jnm.2919

A review of hybrid couplers : state-of-the-art, applications, design issues and challenges

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Author: Abdulbari, Ali Abdulateef1; Abdul Rahim, Sharul Kamal1; Soh, Ping Jack2,3;
Organizations: 1Wireless Communication Centre (WCC), School of Electrical Engineering, Universiti Teknologi Malaysia (UTM), Skudai, Malaysia
2Advanced Communication Engineering (ACE) Centre of Excellence, Faculty of Electronic Engineering Technology, Universiti Malaysia Perlis (UniMAP), Arau, Malaysia
3Centre of Wireless Communications (CWC), University of Oulu, Oulu, Finland
4Faculty of Electrical and Electronic Engineering, University Tun Hussein Onn Malaysia, Batu Pahat, Malaysia
5Department of Electrical/Electronic Engineering, Faculty of Engineering, University of Port Harcourt, Port Harcourt, Nigeria
6Centre for Telecommunication Research and Innovation (CeTRI), Faculty of Electronics and Computer Engineering, Universiti Teknikal Malaysia Melaka (UTeM), Melaka, Malaysia
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2022020818196
Language: English
Published: John Wiley & Sons, 2021
Publish Date: 2022-06-16
Description:

Abstract

In recent years, the hybrid branch-line coupler has attracted much attention due to its appealing features such as of low cost and ease in fabrication for wireless communications. The fifth-generation cellular networks promise to support several wireless technologies by capitalizing a multitude of frequencies and increase data rates. To achieve that, the butler matrix technique can be used to enhance both bandwidth and data rate with the implementation of beamforming. Conventional hybrid couplers are the main component to build a butler matrix, but they are generally bulky in size and narrow in bandwidth. Moreover, requirements imposed by newer wireless technologies makes the efforts in improving size compactness and bandwidth even more challenging. On the other hand, several techniques have been proposed in literature to solve both issues. This study focuses on the design challenges and issues of hybrid coupler designs and technologies, besides underlining their promising potential. In this context, several techniques for hybrid coupler to achieve the required bandwidth and size reduction are highlighted, such as the T-shape, meander line, two sections, three-section, and parallel couple lines.

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Series: International journal of numerical modelling
ISSN: 0894-3370
ISSN-E: 1099-1204
ISSN-L: 0894-3370
Volume: 34
Issue: 5
Article number: e2919
DOI: 10.1002/jnm.2919
OADOI: https://oadoi.org/10.1002/jnm.2919
Type of Publication: A2 Review article in a scientific journal
Field of Science: 213 Electronic, automation and communications engineering, electronics
Subjects:
Copyright information: © 2021 John Wiley & Sons Ltd. This is the peer reviewed version of the following article: Abdulbari, AA, Abdul Rahim, SK, Soh, PJ, Dahri, MH, Eteng, AA, Zeain, MY. A review of hybrid couplers: State-of-the-art, applications, design issues and challenges. Int J Numer Model. 2021; 34:e2919, which has been published in final form at https://doi.org/10.1002/jnm.2919. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.